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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 3221 - 3240 of 36873 results
  • Investigating Hydrogen Station Use and Station Access in California Using a Survey of Fuel Cell Vehicle Drivers
    Investigating Hydrogen Station Use and Station Access in California Using a Survey of Fuel Cell Vehicle Drivers
    Hardman, Scott ;
    Davis, Adam
    2022-04-01 | PDF
    California has set a goal of reaching 100% zero emission vehicle (ZEV) sales by 2035. Most ZEV sales to date have been battery electric vehicles (BEVs) or plug-in hybrid electric vehicles (PHEVs), while fuel cell electric vehicles (FCEVs) make up only a small portion of ZEV sales. The market for FCEVs may be partially constrained because, unlike BE ...
    Supporting Files
  • Evaluation of Missouris NBI Data To Predict the Deterioration of Bridges
    Evaluation of Missouri’s NBI Data To Predict the Deterioration of Bridges
    Washer, Glenn ;
    Myers, John
    2022-04-01 | PDF
    The objectives of this study were to develop deterioration curves for state-owned bridges in Missouri, study certain parameters that affect structure deterioration, and develop recommendations for cost effective designs. The study used inspection history data stored in the National Bridge Inventory (NBI). NBI data from 1983 through 2019 was used to ...
  • A Review of Methods To Change Beliefs
    A Review of Methods To Change Beliefs
    Ward, Nicholas J. ;
    Otto, Jay
    2022-04-01 | PDF
    Because road user behavior is a common factor in traffic crashes, we must explore ways to encourage safer behaviors. Traffic safety culture recognizes that intentional behavior is influenced by the values, beliefs, and attitudes shared among a group of people. Therefore, to change behavior within a group, it is necessary to change beliefs. However, ...
  • 2020 Aerospace Medical Certification Statistical Handbook
    2020 Aerospace Medical Certification Statistical Handbook
    Skaggs, Valerie J. ;
    Norris, Ann I.
    2022-04-01 | PDF
    Introduction: The biennial Aerospace Medical Certification Statistical Handbook reports descriptive characteristics of all active U.S. civil aviation airmen. The 2020 handbook documents the most recent and most widely relevant data on active civil aviation airmen.Methods: Medical certification records from 2015–2020 were selected from the Document ...
  • Rural Transit Fact Book 2022
    Rural Transit Fact Book 2022
    Mattson, Jeremy ;
    Mistry, Dilip
    2022-04-01 | PDF
    Public transportation plays a fundamental role in the livability of communities of all sizes. The Rural Transit Fact Book provides information on transit service availability and cost to help the transit industry in the United States provide efficient and effective service to meet rural community mobility needs. Financial and operating statistics c ...
  • How to Evaluate and Minimize the Risk of COVID19 Transmission within Public Transportation Systems
    How to Evaluate and Minimize the Risk of COVID-19 Transmission within Public Transportation Systems
    Huang, Yiduo ;
    Shen, Zuo-Jun
    2022-04-01 | PDF
    During the COVID-19 outbreak, serious concerns were raised over the risk of spreading the infection on public transportation systems. As the pandemic recedes it will be important to determine optimal timetable design to minimize the risk of new infections as systems resume full service. In this study, the authors developed an integrated optimizatio ...
  • Whats Driving California The Past Present and Futures of Transportation in the Golden State an InDepth Analysis of the Facts Origins and Trends of Transportation and Urban Planning in California
    What’s Driving California?: The Past, Present, and Future(s) of Transportation in the Golden State; an In-Depth Analysis of the Facts, Origins, and Trends of Transportation and Urban Planning in California
    Wasserman, Jacob L. ;
    Garrett, Mark
    2022-04-01 | PDF
    This report examines transportation in California: where we are today, how we got here, and where we might be headed. We begin with facts on travel and transportation systems in California today. The vast majority of personal travel is by car across all socio-economic groups, and commercial travel is by truck. Public transit plays an important role ...
  • Expanding the Oregon Motor Carrier Safety Action Plan Best Return on Investment
    Expanding the Oregon Motor Carrier Safety Action Plan: Best Return on Investment
    Hernandez, Salvador ;
    Anderson, Jason C.
    2022-04-01 | PDF
    This study presents the results of an analysis on the impact of increased law enforcement on truck driver-at-fault crashes and identifies corridors that would make viable candidates for the Oregon MCSAP program. This was accomplished through a descriptive analysis of collected inspection data and Oregon crash data. Next, the safety performance of t ...
  • US Department of Transportation Strategic Plan FY 20222026
    U.S. Department of Transportation Strategic Plan: FY 2022-2026
    United States. Department of Transportation
    2022-04-01 | PDF
    The Fiscal Year 2022-2026 U.S. Department of Transportation Strategic Plan establishes the U.S. Department of Transportation’s (U.S. DOT) strategic goals and objectives for Fiscal Year (FY) 2022 through FY 2026. It comes at a critical time for U.S. DOT and the nation. As a country, we face enormous challenges—a global pandemic, systemic inequality, ...
  • Using XRay Fluorescence to Assess Soil Subgrade Stabilization Competency During Construction Inspection
    Using X-Ray Fluorescence to Assess Soil Subgrade Stabilization Competency During Construction Inspection
    Cerato, Amy B. ;
    Miller, Gerald A.
    2022-04-01 | PDF
    A large portion of transportation corridor projects use lime and other calcium-based stabilizers to reduce soil plasticity, increase shear strength, reduce compressibility, and reduce volume changes when subjected to variations in water content. While design and construction practices for subgrade stabilization have been standardized, there is no e ...
  • Sequencing and Placement of Noise Walls and Retaining Walls on TxDOT Projects
    Sequencing and Placement of Noise Walls and Retaining Walls on TxDOT Projects
    Harbin, Kristopher B ;
    Kraus, Edgar
    2022-04-01 | PDF
    The objective of this research is to provide guidance to project stakeholders for the sequencing and placement of noise walls and retaining walls. The research included examining noise and retaining wall selection, standards and specifications, preferred methods and best practices for sequencing and placement, and design and construction procedures ...
  • Evaluation of Isocyanate Asphalt Additive
    Evaluation of Isocyanate Asphalt Additive
    Mayeux, Corey R ;
    Salari, Saman
    2022-04-01 | PDF
    Modifying asphalt binder is one of the primary methods of improving the performance of asphalt mixtures; the benefits include improved rutting resistance, cracking resistance, increased durability and stripping resistance. The addition of polymer, such as styrene-butadiene-styrene (SBS), is the most common method of modifying asphalt binders; howev ...
  • Evaluation of High Density Polyethylene HDPE Pipes K66 Cherokee County
    Evaluation of High Density Polyethylene (HDPE) Pipes K-66 Cherokee County
    Meggers, David A.
    2022-04-01 | PDF
    The purpose of this project was to install several sections of high density polyethylene (HDPE) pipe for initial and long-term evaluation. Three sections of pipe were installed. Two sections of 24-inch diameter and one section of 30-inch diameter pipe were installed during the reconstruction of K-66 between Riverton and Galena, Kansas. The pipes we ...
  • A Rhode Trip Lessons for the Future of Mobility From the Little Roady Autonomous Microtransit Pilot
    A Rhode Trip: Lessons for the Future of Mobility From the Little Roady Autonomous Microtransit Pilot
    Marini, Megan ;
    Simpson, Troy
    2022-04-01 | PDF
    The Little Roady Autonomous Vehicle (AV) shuttle pilot was coordinated by the Rhode Island Department of Transportation and consisted of a free daily shuttle service operated from May 2019 through June 2020 along a twelve-stop, 5.3-mile loop along the Woonasquatucket Corridor in Rhode Island. Key goals of the Little Roady project were to safely int ...
  • Developing FDR Sections with InHouse Resources
    Developing FDR Sections with In-House Resources
    Texas A&M Transportation Institute
    2022-04-01 | PDF
    The objectives of the presentation are: 1. Describe the steps necessary for properly developing an FDR candidate project 2. Identify which department's resources are required 3. Explain procedures required to successfully start FDR construction. The presentation sought to show the benefits of Full Depth Reclamation (FDR), what makes a good FDR cand ...
  • Expanding FDR Technologies in Maintenance Operations Technical Report
    Expanding FDR Technologies in Maintenance Operations: Technical Report
    Sebesta, Stephen ;
    Scullion, Tom
    2022-04-01 | PDF
    Full-depth reclamation (FDR) is the main approach used across Texas to rehabilitate thin roadways that are structurally damaged. With the Eagle Ford Shale boom, the Texas Department of Transportation (TxDOT) faced the need to rehabilitate many miles of pavement in energy-sector areas of the state while placing heavy traffic back on the roadway the ...
  • Critical Assessment of HFSTs LongTerm Performance in Georgia Under Different Roadway Conditions
    Critical Assessment of HFST’s Long-Term Performance in Georgia Under Different Roadway Conditions
    Tsai, Yichang (James) ;
    Wang, Zhonghua
    2022-04-01 | PDF
    The Georgia Department of Transportation (GDOT) uses high friction surface treatment (HFST) as a countermeasure to address curve-related crashes proactively and reactively. In the US, as of December 2020, Georgia has the highest number of pavement miles and curve sites that use epoxy-based friction improvement surface treatments (FIST). These sites ...
  • Design and Detailing of Anchorages for Externally Bonded CFRP
    Design and Detailing of Anchorages for Externally Bonded CFRP
    Suksawang, Nakin ;
    Ryan, Paul
    2022-04-01 | PDF
    Recently, an increased number of CFRP repairs have been applied to strengthen concrete bridges' shear capacity. This poses many challenges as the bridge girder cannot be fully wrapped to ensure that the failure mode is governed by shear fracture combined with or followed by the CFRP fracture. Therefore, instead of fully wrapping the beam with CFRP, ...
  • Evaluation of Curing Effects on Cold InPlace Recycled CIR Materials
    Evaluation of Curing Effects on Cold In-Place Recycled (CIR) Materials
    Dave, Eshan V. ;
    Sias, Jo E.
    2022-04-01 | PDF
    Most cold In-place recycled (CIR) construction uses asphalt emulsion or foamed asphalt with or without active fillers as a stabilizing agent. To ensure the CIR layer gains appreciable stiffness and strength to support traffic, the stabilizing agents have to undergo curing (to dry additional moisture). If traffic is allowed on the CIR layer before s ...
  • Evaluating Ramp Meter Wait Time in Utah
    Evaluating Ramp Meter Wait Time in Utah
    Schultz, Grant G. ;
    Macfarlane, Gregory S
    2022-04-01 | PDF
    The purpose of this project is to develop an algorithm that can predict ramp meter wait time at metered freeway on-ramps throughout the state of Utah using existing loop detector systems on the ramps. The loop detectors provide data in 60-second increments that include volume, occupancy, and the metering rate. Using these data sources, several ramp ...
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